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December, 1914 THE MARINE REVIEW Fig. 1 an End View; and Fig. 2 Shows Plan of Cover When' Closed. Figs. 3 and 4 Show the Method of Jointing the Cover by an Edge Strip of Canvas Pressed Against the Coam- ing by the Usual Wedge, and Batten Bars. Fig. 5 Shows How the Cover is Sometimes Jointed When Made in Two Parts, by a Strip of Canvas Secured Over the Joint by a Bar and the Usual Wedges. 1 1 of Rubber Over it as in Figs. 6 and 7. Securely Fastened to the Coamings. Span and Tackle or by Derrick. as the strip is raised with the hatch, the ease of operation is simplicity itself and while they are slightly of increased cost to wood covers in a few years this dif- ference will be' entirely wiped out on account of the entire absence of any DeRUSETT HATCH COVER IN UP- RIGHT POSITION cost for maintenance, whereas, as is well known, wood hatch covers are con- tinually being lost, stolen by the firemen "to light up, broken, dropped overboard, or left on dock, causing a continual ex- her Method of Making This Joint Watertight is by Pressing a Strip Se a The "Cavers es of Steel, Hinged or Portable, and They May be Liited Either Directly Off the Mast by penditure for replacement. In addition to this, there is the cost for renewals of canvas tarpaulins, which is very con- siderable on account of the large area to be covered, whereas, as already stated, the amount of canvas required for a DeRusset hatch is infinitesimally small. The agent for these hatch covers for the United States and Canada is Chas. Skentelbery, New England Coal & Coke Co., 111 Devonshire street, Boston, Mass. Three-Gun Turrets Preparations are being made at the Fore River shipyards for the installation on the new battleship Nevada for the first three-gun turret ever placed on any American warship. These turrets will be the best protected of any in the world, and they will be the heaviest ever set up, weighing on the average about 80 tons, or some 11 tons more than the turrets on the Argentine battle- ship Rivadavia, which was considered the "last word" in naval construction when she was laid down. There is necessary a large amount of work before the turrets may be set in their proper places, putting in protective armor below decks for the mechanical appliances used to operate and carry am- munition to the turrets, laying the tracks on which the massive pieces of armor 459 are moved and planing off the bottom of the turrets to get them perfectly ad-. justed- All of this work is well along towards completion. Each of these turrets will have three 14-inch guns, the most powerful on any United States battleship and rivalled by a few guns in the British and German fleets. These 14-inch guns weigh on the average about 147,500 pounds, or a ton more than the Rivadavia's 12-inch pieces. The Nevada guns measure 53 feet in length, compared with 50 feet for the Rivadavia's. The American © ship's ordnance is of 45 calibre, the Argentine ship's of 50 calibre. Perhaps nothing shows the superiority of the new guns more clearly than the charges they will be able to throw against an enemy, 1,400 pounds of weight and containing a much larger amount of high explosive to cause damage when it hits the mark, compared with an 870-pound projectile for the 12-inch pieces. Two of these three-gun turrets are to be set up, one on the forecastle deck and one on the quarter-deck, with a two-gun turret behind and slightly above each. Thus there will be five 14-inch guns facing ahead and a similar number facing astern, with ability to concen- trate the fire of all ten guns at either side or almost directly ahead or astern. The tremendous advantage of such an arrangement has made a deep impres- sion on naval authorities the world over. The New York and Texas, the only American ships in commission with 14- inch guns, carry them mounted in five two-gun turrets instead of four as on the Nevada and her sister ship, the Oklahoma, which is being constructed by the New York Ship Building Co., at Camden, N. J. The-side armor of the Nevada is well along towards all being in place, but it is figured that between three and four months more will be needed to com- plete this work. Owing to the fact that the Nevada will use only oil for fuel she will have but one smokestack and will be able to concentrate her boilers in the middle of the ship and afford them heretofore unknown security in the form of the heaviest armor ever employed for this purpose. The State department has received from the British government a list of articles which have heen added to the original proclamation on commodities that England considers as conditional contraband. These articles are: Cop- per, unwrought lead, pig, sheet or pipe; glycerine, ferro-chrome, hema- tite iron ore, magnetic iron ore, rub- ber, hides and skins raw or rough tanned, but not including dressed leather.